<style>
.myloading{
      position: fixed;
      top: 40%;
      left: 46%;
      width: 5%;
      min-width:50px;
      z-index: 99999999;
      }
</style>

<img class="myloading" src="/static/fonts/loading.svg" alt="Loading icon" />

<script src="/static/js/jquery.min.js"></script>
<script>
    $(window).load(function(){
    //适当延迟隐藏，提高loading效果
    //$('#loading_all').delay(1000).hide(0);
    $('.myloading').hide(0);
    });
</script>